Cotter-pin extractor



Nov. 4 1924. 1,514.11?

F. W. WIL-DER COTTER PIN EXTRACTOR Filed Sept. 6 1921 Patented Nov. t, 1924 FRANK W. ELDER, OF VJATERTOXVN, CONNECTICUT.

COT'lEfi-PIN Application filed September To all whom it may concern:

Be it known that I, FRANK W. VViLDER,

I a citizen of the United States, residing at lVatertown, in the county of Litchfield and State of Connecticut, have invented a new and useful Improvement in Cotter-Pin EX- tractors, of which the following is a specification.

This invention relates to a tool which is primarily designed for extracting cotter pins from the holes in which they, are located although it may have characteristics which enable it to be used for driving, clinching and unclinching such pins.

The objects of the invention is to provide a simple, cheap, powerful and convenient tool which can be used for withdrawing cotter pins of all sizes not only from easily accessible positions but from localities and situations which are more or less inaccessible to the means commonly employed for the purpose.

This object is attained by bending a rod or bar ot suitable metal so as to form two arms, one desirably longer than the other, disposed at an angle with each other, and shaping the ends of the arms so that they may be readily engaged with cotter pins for performing the desired functions of ear- I tracting, or clinching, or unclinching, or

driving, as the condition requires.

In the accompanying drawings Figure 1 shows an edge view of a tool that embodies the invention. Fig. 2 is a side View of the same tool. Fig. 3 is a section on the line on Fig. 2. Fig. 4 shows a side view of a modified form of the tool. Fig. is a section on the line 55 on Fig. 1. Fig. 6 shows a side View of another modification. Fig. 7 is a section on line 7-7 on Fig. 6. Fig. 8 is a section on line 88 on Fig. 6.

The tool first illustrated is bent from a rod or bar of steel of suitable size and any desired cross section to form a long arm 1 and a short arm 2 which extend at sub stantially right angles to each other. The angular disposition of these arms may however at the bend 3 be slightly greater or less than a right angle. The arm 2 is shown as oval in cross section and it tapers down to a nxraaoroa.

e, 1921. Serial in. 498,844.

point s so as to form an oval pointed wedge. The arm 1 is shown as flattened and as tapering down to a chisel or screw driver end 5. The bend at the junction of the arms is shaped as to form a head 6 opposite the arm 2 which may be struck a blow with a hammer when it is desired to drive the point 4: of the arm2 into the eye of a cotter pin. There is also a head 7 opposite the arm 1 which may be struck a blow with a hammer when it is desired to drive the chisel end 5 of the arm 1 between the ends of a pin for separating them or beneath the pin ends for unclinching them. The head 7 also provides a point that may be struck when necessary to start a pin engaged by the arm 2. The outer corner of the bend at the junction of the arms between the heads is rounded so as to form a fulcrum upon which the tool may be rocked when withdrawing a pin into which an arm is driven.

The pointt is forced into the eye of a cotter pin by hand or by the blow of a hammer struck against the head 6 and by the wedging action of the arm 2 the pin started from its position. Owing to the wedge shape of the arm this is ordinarily sutlicient to cause the bent ends of the pin to draw together and the pin to start from its hole. Then the tool is rocked on the fulcrum corner at the bend and the pin completely withdrawn. If the pin sticks in the hole the tool may be hit on the head 7 by a hammer for releasing it. This head'may be hit by a hammer when the chisel end of the long arm is driven between the points of a pin for separating them or when the chisel end is driven under the bent ends of a pin for unclinching them. The head 6 may be used as a hammer the arm 1 being grasped in the hand for driving a pin into its hole or for bending the ends of a driven pm.

In the form described the arm 2 is an oval pointed wedge and the arm 1 is a chisel ended wedge. Instead of being oval the arm may be circular in cross section as is the arm 8 in Fig. 4, and instead of having a chisel end the long arm may be rounded as arms of unequal length extending at substantially right angles to each other, the shorter of said arms tapering to a point and the outer surface of the bar at the bend thereof being rounded and free from projections. 1

FRANK W; W'ILDER. 

